Great question. It's not really about whether it's written or spoken (a later version of CodeMic will have written guides as well as audio/video/image).

It's about the guide happening inside your IDE next to your code. When the guide talks about a specific part of the code, it should be shown right there next to it. Not a small snippet of the code but the code in its proper context where you can use your IDE to dig deeper into it, see the relevant docs, change it, run it, experiment with it.

With CodeMic, the guide is synced to the code inside the IDE. It's really a different experience.